Explosive-engine



P. W. MURPHY. EXPLOSIVE ENGINE. APPLICATION FILED AP'R.20, 191s.

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P. W. MURPHY.

EXPLOSIVE ENGINE.

APPLICATION FILED APR 20. I9l8. 1,352,985.

Patented Sept. 14,1920.

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Mme stars PATENT WHQEQ PETER W. MURPHY, OF DETROIT, MICHIGAN, ASSIGNOR TO THE MURPHY ENGINEER- ING COMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

EXPLOSIVE-ENGINE.

Application filed April 20,

To all whom it may concm'n:

Be it known that I, PETER W. MURPHY, a citizen of the United States of America, residin at Detroit, in the county of Wayne and @tate of Michigan, have invented certain new and useful Improvements in Explosive-Engines,'of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to valve gears in multi-cylinder engines of the rotary chamber type wherein there is interrotation between the main shaft and cylinders disposed in sets concentrically therearound, the shaft revolving when the cylinders are fixed, or

the cylinders revolving when the shaft is fixed.

. The invention consists in the matters hereinafter set forth, and more particularlypointed out in the appended claims.

In the drawings,-

Figure 1 is a view partially in longitudinal section and partially in elevation and broken away of a valve gear applied to an engine of the typedesignated that embodies features of the invention;

Fig. 2 is a view in end elevation, partially broken away and in section, of a cylinder gear and manifold, and

Fig. 3 is a diagrammatic view showing one method of timing the cylinder.

As herein indicated, a main shaft 1, carries a cylindrical cam block 2 on which acam rib 3 is formed. A series of cylinders 4 are disposed in opposed sets around the shaft with the axes thereof concentric with the shaft axis and on either side of the cam block 2, there being appropriate thrust bearings 5 and like means for facilitating the rotation of the shaft in the cylinders or the cylinders on the shaft. The piston heads 6 of each alined pair of cylinders are connected by stems 7 and 8 that in turn are rigidly secured to reciprocate in unison by a cam roller yoke 9 of appropriate desigmhaving a portion 10 that travels in a guideway 11 of a main frame.12 that connects the cylinder sections. A pair of axially adjustable conoidal cam rolls 13 are mounted on the yoke which bridges over'the cam flange 3. to engage the opposite faces thereof, whereby any impulse given to the pistons in alternation causes the rotation of the cylinders in relation to the cam block 2 or of the cam Specification of Letters Patent.

Patented Sept. 14, 1920.

1918. Serial no. 229,675.

cylinder and the compression space '16 through a port 19.

. Each of the ports 17 is controlled by an inwardly opening intake valve closure 20 of puppet type the stem of which is normally projected by a spring 21 in compression between the cylinder head and an adjustably disposed stop 22 on the stem. Similarly. the exhaust ports 19 are each controlled by a puppet type, inwardly opening closure 23. The stem 24 of the closure 23 is projected by a spring 25 in compression between the cylinder head and an adjustable stop 26 on the exhaust stem 24.

A suitably arranged cam 27 is secured on the main shaft and engages the lever arm 28 of a double rocking beam 29 which is pivotcd on any suitable extension 30 of the head. Adjustable studs 31 on the outer arms 32 of the several rock beams abut the intake valve stems 21 to depress and open the intake valves. The inner arms 33 of the rock beams have adjustable'studs 34 that depress the companion stems 24 of the exhaust valves. The cycle of operation of each cylinder, where there are four in each set as herein indicated, are plainly shown in the diagram, the two cams, the valves and 'driv'- ing.

the piston as indicated forces the cam rolls down the cam until the piston is fully projected when the exhaust or scavenging return stroke is occasioned in turn by this driving cam, and this is followed by the intake and compression strokes in the regular four cycle manner, the intake and exhaust valves operating during these phases of each cycle as indicated clearly in the diagram.

Of course any number of cylinders desired may be mounted in this way, the cam for the valves and the driving cam being appropriately fashioned to produce the desired cycle in the cylinder.

By this means a multi-cylinder engine is being timed so that the explosion of obtained having a single pair of cams, one for translating the motion of the several pistons into a rotatable driving motion and the other serving to open the valves, both intake and exhaust, in proper timed relation to the piston movement, the valves being readily adjusted severally to compensate for.

wear. It is to be understood that the usual provision for firing is made as by the insertion of the spark plugs 37 and friction rolls 38 may be employed wherever desired on the valve operating mechanism while the usual arrangements of lubrication are also made.

Obviously, changes in the details of construction may be made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangement of parts.

hat I claim is: e

1. In an internal combustion engine a rotatable main shaft, sets of opposed cylinders disposed symmetrically around the shaft, pistons for the cylinders, driving connections between the pistons and the shaft adapted to cause interrotation between the cylinders and the shaft, a head common to the cylinders of each set and havingan intake passage adapted to connect witha fixed source of supply and an exhaust passage which opens outwardly away from said shaft, intake valves controlling the communication between the intake passage and the cylinder, exhaust valves controlling the communication between the cylinders and the exhaust passage. a single grooved valve operating member secured on the main shaft and rotatable therewith and a T-shaped lever pivotally supported adjacent each cylinder and operated by said valve operating member, said T-shaped lever having one of its arms engaging the intake valve and its other arm engaging the exhaust valve and its third arm engaging the groove in said valve operating member and being arranged to open the intake and exhaust valves alternately in synchronism with the piston stroke.

2. In an internal combustion chamber a v rotatable main shaft, sets of opposed cylinders disposed symmetrically around and parallel to the shaft, and arranged in pairs, the pistons of each pair having a common piston rod, means connecting the several piston rods and the shaft and adapted to cause relative rotation of the cylinders and the shaft under the piston impulses, a head common to the cylinders of each set and having an annular intake passage provided with an outwardly projecting connection adapted to be connected with a suitable source of fuel supply, and an annular exhaust passage having a port opening outwardly past said intake passage, an intake valve for each cylinder controlling communication between the latter and the intake passage, an exhaust valvefor each let and exhaust valves of said cylinders to.

open the valves in synchronism with the piston stroke.

3. In an internal combustion engine a rotatable main shaft, sets of opposed cylinders disposed symmetrically around and parallel to the shaft, pistons for the cylinders, a single driving cam on the main shaft and operatively connected to the pistons of the opposed cylinders to cause interrotation between the cylinders and the shaft under the impulses of the pistons, a single head for each set of cylinders having an intake provided with an outwardly extending port adapted to connect with some fixed source of fuel supply. an annular exhaust passage positioned within said intake passage and surrounding the shaft and having a port extending outwardly past the intake passage, ports connecting the intake and exhaust passages with each of the cylinders. an intake valve for each cylinder controlling communication between the intake passage and the cylinder, an exhaust valve for each cylinder controlling communication between the exhaust passage and the cylinder, a T- shaped rock-beam in each cylinder head having arms operatively connected to the intake and exhaust valves so as, to alternately open each of the valves. and a single 

